(1) Using the "old" FM-radio application after Qradio also seems to fix this issue with microphone. (2) Also, the bluetooth-network problem is easier with FM-radio. After Qradio is quit, it disables Bluetooth and it has to be manually enabled again for example so bluetooth-network can be restarted or auto-reconnect again. With FM-radio, it does not disable bluetooth if it was enabled when the FM-radio was started. Either it remembers the state, or then it somehow uses FM+BT-chip differently.
amixer -qc0 cset iface=MIXER,name='Input Select' 'Digital Mic' amixer -qc0 cset iface=MIXER,name='PGA Capture Switch' off amixer -qc0 cset iface=MIXER,name='Left PGA Mixer Line2L Switch' off amixer -qc0 cset iface=MIXER,name='Left DAC_L1 Mixer HP Switch' off amixer -qc0 cset iface=MIXER,name='Right PGA Mixer Line2R Switch' off amixer -qc0 cset iface=MIXER,name='Right DAC_L1 Mixer HP Switch' off amixer -qc0 cset iface=MIXER,name='HP DAC Playback Volume' 0,0